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Time-dependent thermal X-ray afterglows from GRBS |
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| Authors: | DI Kosenko SI Blinnikov KA Postnov P Lundqvist EI Sorokina |
| Institution: | aSternberg Astronomical Institute, Moscow State University, Universitetskij pr. 13, 119992 Moscow, Russia bInstitute for Experimental and Theoretical Physics, B. Cheremushkinskaja 25, 117218, Moscow, Russia cStockholm Observatory, Albanova, Stockholm, Sweden |
| Abstract: | Time-dependent thermal X-ray spectra are calculated from physically plausible conditions around GRB. It is shown that account for time-dependent ionization processes strongly affects the observed spectra of hot rarefied plasma. These calculations may provide an alternative explanation to the observed X-ray lines of early GRBs afterglows (such as GRB 011211). Our technique will allow one to obtain independent constraints on the GRB collimation angle and on the clumpiness of circumstellar matter. |
| Keywords: | GRB afterglows γ-ray bursts X-ray spectra |
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